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/application/libraries/getid3/module.audio-video.asf.php

https://github.com/libis/Flandrica
PHP | 1862 lines | 1154 code | 392 blank | 316 comment | 112 complexity | b542342119f02f24fa48a7bb09994f00 MD5 | raw file
Possible License(s): GPL-3.0, LGPL-2.1, Apache-2.0

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  1. <?php
    2. 

  2. // +----------------------------------------------------------------------+
    3. 

  3. // | PHP version 5                                                        |
    4. 

  4. // +----------------------------------------------------------------------+
    5. 

  5. // | Copyright (c) 2002-2009 James Heinrich, Allan Hansen                 |
    6. 

  6. // +----------------------------------------------------------------------+
    7. 

  7. // | This source file is subject to version 2 of the GPL license,         |
    8. 

  8. // | that is bundled with this package in the file license.txt and is     |
    9. 

  9. // | available through the world-wide-web at the following url:           |
    10. 

  10. // | http://www.gnu.org/copyleft/gpl.html                                 |
    11. 

  11. // +----------------------------------------------------------------------+
    12. 

  12. // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
    13. 

  13. // +----------------------------------------------------------------------+
    14. 

  14. // | Authors: James Heinrich <infoŘgetid3*org>                            |
    15. 

  15. // |          Allan Hansen <ahŘartemis*dk>                                |
    16. 

  16. // +----------------------------------------------------------------------+
    17. 

  17. // | module.audio-video.php                                               |
    18. 

  18. // | Module for analyzing Microsoft ASF, WMA and WMV files.               |
    19. 

  19. // | dependencies: module.audio-video.riff.php                            |
    20. 

  20. // +----------------------------------------------------------------------+
    21. 

  21. //
    22. 

  22. // $Id: module.audio-video.asf.php,v 1.7 2006/12/01 22:39:48 ah Exp $
    23. 

  23. 

  24. 

  25. 

  26. class getid3_asf extends getid3_handler
    27. 

  27. {
    28. 

  28. 

  29.     const Extended_Stream_Properties_Object   = '14E6A5CB-C672-4332-8399-A96952065B5A';
    30. 

  30.     const Padding_Object                      = '1806D474-CADF-4509-A4BA-9AABCB96AAE8';
    31. 

  31.     const Payload_Ext_Syst_Pixel_Aspect_Ratio = '1B1EE554-F9EA-4BC8-821A-376B74E4C4B8';
    32. 

  32.     const Script_Command_Object               = '1EFB1A30-0B62-11D0-A39B-00A0C90348F6';
    33. 

  33.     const No_Error_Correction                 = '20FB5700-5B55-11CF-A8FD-00805F5C442B';
    34. 

  34.     const Content_Branding_Object             = '2211B3FA-BD23-11D2-B4B7-00A0C955FC6E';
    35. 

  35.     const Content_Encryption_Object           = '2211B3FB-BD23-11D2-B4B7-00A0C955FC6E';
    36. 

  36.     const Digital_Signature_Object            = '2211B3FC-BD23-11D2-B4B7-00A0C955FC6E';
    37. 

  37.     const Extended_Content_Encryption_Object  = '298AE614-2622-4C17-B935-DAE07EE9289C';
    38. 

  38.     const Simple_Index_Object                 = '33000890-E5B1-11CF-89F4-00A0C90349CB';
    39. 

  39.     const Degradable_JPEG_Media               = '35907DE0-E415-11CF-A917-00805F5C442B';
    40. 

  40.     const Payload_Extension_System_Timecode   = '399595EC-8667-4E2D-8FDB-98814CE76C1E';
    41. 

  41.     const Binary_Media                        = '3AFB65E2-47EF-40F2-AC2C-70A90D71D343';
    42. 

  42.     const Timecode_Index_Object               = '3CB73FD0-0C4A-4803-953D-EDF7B6228F0C';
    43. 

  43.     const Metadata_Library_Object             = '44231C94-9498-49D1-A141-1D134E457054';
    44. 

  44.     const Reserved_3                          = '4B1ACBE3-100B-11D0-A39B-00A0C90348F6';
    45. 

  45.     const Reserved_4                          = '4CFEDB20-75F6-11CF-9C0F-00A0C90349CB';
    46. 

  46.     const Command_Media                       = '59DACFC0-59E6-11D0-A3AC-00A0C90348F6';
    47. 

  47.     const Header_Extension_Object             = '5FBF03B5-A92E-11CF-8EE3-00C00C205365';
    48. 

  48.     const Media_Object_Index_Parameters_Obj   = '6B203BAD-3F11-4E84-ACA8-D7613DE2CFA7';
    49. 

  49.     const Header_Object                       = '75B22630-668E-11CF-A6D9-00AA0062CE6C';
    50. 

  50.     const Content_Description_Object          = '75B22633-668E-11CF-A6D9-00AA0062CE6C';
    51. 

  51.     const Error_Correction_Object             = '75B22635-668E-11CF-A6D9-00AA0062CE6C';
    52. 

  52.     const Data_Object                         = '75B22636-668E-11CF-A6D9-00AA0062CE6C';
    53. 

  53.     const Web_Stream_Media_Subtype            = '776257D4-C627-41CB-8F81-7AC7FF1C40CC';
    54. 

  54.     const Stream_Bitrate_Properties_Object    = '7BF875CE-468D-11D1-8D82-006097C9A2B2';
    55. 

  55.     const Language_List_Object                = '7C4346A9-EFE0-4BFC-B229-393EDE415C85';
    56. 

  56.     const Codec_List_Object                   = '86D15240-311D-11D0-A3A4-00A0C90348F6';
    57. 

  57.     const Reserved_2                          = '86D15241-311D-11D0-A3A4-00A0C90348F6';
    58. 

  58.     const File_Properties_Object              = '8CABDCA1-A947-11CF-8EE4-00C00C205365';
    59. 

  59.     const File_Transfer_Media                 = '91BD222C-F21C-497A-8B6D-5AA86BFC0185';
    60. 

  60.     const Old_RTP_Extension_Data              = '96800C63-4C94-11D1-837B-0080C7A37F95';
    61. 

  61.     const Advanced_Mutual_Exclusion_Object    = 'A08649CF-4775-4670-8A16-6E35357566CD';
    62. 

  62.     const Bandwidth_Sharing_Object            = 'A69609E6-517B-11D2-B6AF-00C04FD908E9';
    63. 

  63.     const Reserved_1                          = 'ABD3D211-A9BA-11CF-8EE6-00C00C205365';
    64. 

  64.     const Bandwidth_Sharing_Exclusive         = 'AF6060AA-5197-11D2-B6AF-00C04FD908E9';
    65. 

  65.     const Bandwidth_Sharing_Partial           = 'AF6060AB-5197-11D2-B6AF-00C04FD908E9';
    66. 

  66.     const JFIF_Media                          = 'B61BE100-5B4E-11CF-A8FD-00805F5C442B';
    67. 

  67.     const Stream_Properties_Object            = 'B7DC0791-A9B7-11CF-8EE6-00C00C205365';
    68. 

  68.     const Video_Media                         = 'BC19EFC0-5B4D-11CF-A8FD-00805F5C442B';
    69. 

  69.     const Audio_Spread                        = 'BFC3CD50-618F-11CF-8BB2-00AA00B4E220';
    70. 

  70.     const Metadata_Object                     = 'C5F8CBEA-5BAF-4877-8467-AA8C44FA4CCA';
    71. 

  71.     const Payload_Ext_Syst_Sample_Duration    = 'C6BD9450-867F-4907-83A3-C77921B733AD';
    72. 

  72.     const Group_Mutual_Exclusion_Object       = 'D1465A40-5A79-4338-B71B-E36B8FD6C249';
    73. 

  73.     const Extended_Content_Description_Object = 'D2D0A440-E307-11D2-97F0-00A0C95EA850';
    74. 

  74.     const Stream_Prioritization_Object        = 'D4FED15B-88D3-454F-81F0-ED5C45999E24';
    75. 

  75.     const Payload_Ext_System_Content_Type     = 'D590DC20-07BC-436C-9CF7-F3BBFBF1A4DC';
    76. 

  76.     const Old_File_Properties_Object          = 'D6E229D0-35DA-11D1-9034-00A0C90349BE';
    77. 

  77.     const Old_ASF_Header_Object               = 'D6E229D1-35DA-11D1-9034-00A0C90349BE';
    78. 

  78.     const Old_ASF_Data_Object                 = 'D6E229D2-35DA-11D1-9034-00A0C90349BE';
    79. 

  79.     const Index_Object                        = 'D6E229D3-35DA-11D1-9034-00A0C90349BE';
    80. 

  80.     const Old_Stream_Properties_Object        = 'D6E229D4-35DA-11D1-9034-00A0C90349BE';
    81. 

  81.     const Old_Content_Description_Object      = 'D6E229D5-35DA-11D1-9034-00A0C90349BE';
    82. 

  82.     const Old_Script_Command_Object           = 'D6E229D6-35DA-11D1-9034-00A0C90349BE';
    83. 

  83.     const Old_Marker_Object                   = 'D6E229D7-35DA-11D1-9034-00A0C90349BE';
    84. 

  84.     const Old_Component_Download_Object       = 'D6E229D8-35DA-11D1-9034-00A0C90349BE';
    85. 

  85.     const Old_Stream_Group_Object             = 'D6E229D9-35DA-11D1-9034-00A0C90349BE';
    86. 

  86.     const Old_Scalable_Object                 = 'D6E229DA-35DA-11D1-9034-00A0C90349BE';
    87. 

  87.     const Old_Prioritization_Object           = 'D6E229DB-35DA-11D1-9034-00A0C90349BE';
    88. 

  88.     const Bitrate_Mutual_Exclusion_Object     = 'D6E229DC-35DA-11D1-9034-00A0C90349BE';
    89. 

  89.     const Old_Inter_Media_Dependency_Object   = 'D6E229DD-35DA-11D1-9034-00A0C90349BE';
    90. 

  90.     const Old_Rating_Object                   = 'D6E229DE-35DA-11D1-9034-00A0C90349BE';
    91. 

  91.     const Index_Parameters_Object             = 'D6E229DF-35DA-11D1-9034-00A0C90349BE';
    92. 

  92.     const Old_Color_Table_Object              = 'D6E229E0-35DA-11D1-9034-00A0C90349BE';
    93. 

  93.     const Old_Language_List_Object            = 'D6E229E1-35DA-11D1-9034-00A0C90349BE';
    94. 

  94.     const Old_Audio_Media                     = 'D6E229E2-35DA-11D1-9034-00A0C90349BE';
    95. 

  95.     const Old_Video_Media                     = 'D6E229E3-35DA-11D1-9034-00A0C90349BE';
    96. 

  96.     const Old_Image_Media                     = 'D6E229E4-35DA-11D1-9034-00A0C90349BE';
    97. 

  97.     const Old_Timecode_Media                  = 'D6E229E5-35DA-11D1-9034-00A0C90349BE';
    98. 

  98.     const Old_Text_Media                      = 'D6E229E6-35DA-11D1-9034-00A0C90349BE';
    99. 

  99.     const Old_MIDI_Media                      = 'D6E229E7-35DA-11D1-9034-00A0C90349BE';
    100. 

  100.     const Old_Command_Media                   = 'D6E229E8-35DA-11D1-9034-00A0C90349BE';
    101. 

  101.     const Old_No_Error_Concealment            = 'D6E229EA-35DA-11D1-9034-00A0C90349BE';
    102. 

  102.     const Old_Scrambled_Audio                 = 'D6E229EB-35DA-11D1-9034-00A0C90349BE';
    103. 

  103.     const Old_No_Color_Table                  = 'D6E229EC-35DA-11D1-9034-00A0C90349BE';
    104. 

  104.     const Old_SMPTE_Time                      = 'D6E229ED-35DA-11D1-9034-00A0C90349BE';
    105. 

  105.     const Old_ASCII_Text                      = 'D6E229EE-35DA-11D1-9034-00A0C90349BE';
    106. 

  106.     const Old_Unicode_Text                    = 'D6E229EF-35DA-11D1-9034-00A0C90349BE';
    107. 

  107.     const Old_HTML_Text                       = 'D6E229F0-35DA-11D1-9034-00A0C90349BE';
    108. 

  108.     const Old_URL_Command                     = 'D6E229F1-35DA-11D1-9034-00A0C90349BE';
    109. 

  109.     const Old_Filename_Command                = 'D6E229F2-35DA-11D1-9034-00A0C90349BE';
    110. 

  110.     const Old_ACM_Codec                       = 'D6E229F3-35DA-11D1-9034-00A0C90349BE';
    111. 

  111.     const Old_VCM_Codec                       = 'D6E229F4-35DA-11D1-9034-00A0C90349BE';
    112. 

  112.     const Old_QuickTime_Codec                 = 'D6E229F5-35DA-11D1-9034-00A0C90349BE';
    113. 

  113.     const Old_DirectShow_Transform_Filter     = 'D6E229F6-35DA-11D1-9034-00A0C90349BE';
    114. 

  114.     const Old_DirectShow_Rendering_Filter     = 'D6E229F7-35DA-11D1-9034-00A0C90349BE';
    115. 

  115.     const Old_No_Enhancement                  = 'D6E229F8-35DA-11D1-9034-00A0C90349BE';
    116. 

  116.     const Old_Unknown_Enhancement_Type        = 'D6E229F9-35DA-11D1-9034-00A0C90349BE';
    117. 

  117.     const Old_Temporal_Enhancement            = 'D6E229FA-35DA-11D1-9034-00A0C90349BE';
    118. 

  118.     const Old_Spatial_Enhancement             = 'D6E229FB-35DA-11D1-9034-00A0C90349BE';
    119. 

  119.     const Old_Quality_Enhancement             = 'D6E229FC-35DA-11D1-9034-00A0C90349BE';
    120. 

  120.     const Old_Number_of_Channels_Enhancement  = 'D6E229FD-35DA-11D1-9034-00A0C90349BE';
    121. 

  121.     const Old_Frequency_Response_Enhancement  = 'D6E229FE-35DA-11D1-9034-00A0C90349BE';
    122. 

  122.     const Old_Media_Object                    = 'D6E229FF-35DA-11D1-9034-00A0C90349BE';
    123. 

  123.     const Mutex_Language                      = 'D6E22A00-35DA-11D1-9034-00A0C90349BE';
    124. 

  124.     const Mutex_Bitrate                       = 'D6E22A01-35DA-11D1-9034-00A0C90349BE';
    125. 

  125.     const Mutex_Unknown                       = 'D6E22A02-35DA-11D1-9034-00A0C90349BE';
    126. 

  126.     const Old_ASF_Placeholder_Object          = 'D6E22A0E-35DA-11D1-9034-00A0C90349BE';
    127. 

  127.     const Old_Data_Unit_Extension_Object      = 'D6E22A0F-35DA-11D1-9034-00A0C90349BE';
    128. 

  128.     const Web_Stream_Format                   = 'DA1E6B13-8359-4050-B398-388E965BF00C';
    129. 

  129.     const Payload_Ext_System_File_Name        = 'E165EC0E-19ED-45D7-B4A7-25CBD1E28E9B';
    130. 

  130.     const Marker_Object                       = 'F487CD01-A951-11CF-8EE6-00C00C205365';
    131. 

  131.     const Timecode_Index_Parameters_Object    = 'F55E496D-9797-4B5D-8C8B-604DFE9BFB24';
    132. 

  132.     const Audio_Media                         = 'F8699E40-5B4D-11CF-A8FD-00805F5C442B';
    133. 

  133.     const Media_Object_Index_Object           = 'FEB103F8-12AD-4C64-840F-2A1D2F7AD48C';
    134. 

  134.     const Alt_Extended_Content_Encryption_Obj = 'FF889EF1-ADEE-40DA-9E71-98704BB928CE';
    135. 

  135. 

  136. 

  137. 

  138.     public function Analyze() {
    139. 

  139. 

  140.         $getid3 = $this->getid3;
    141. 

  141. 

  142.         $getid3->include_module('audio-video.riff');
    143. 

  143. 

  144.         !isset($getid3->info['audio']) and $getid3->info['audio'] = array();
    145. 

  145.         !isset($getid3->info['video']) and $getid3->info['video'] = array();
    146. 

  146.         $getid3->info['asf']['comments'] = $getid3->info['asf']['header_object'] = array();
    147. 

  147. 

  148.         $info_audio             = &$getid3->info['audio'];
    149. 

  149.         $info_video             = &$getid3->info['video'];
    150. 

  150.         $info_asf               = &$getid3->info['asf'];
    151. 

  151.         $info_asf_comments      = &$info_asf['comments'];
    152. 

  152.         $info_asf_header_object = &$info_asf['header_object'];
    153. 

  153. 

  154.         // ASF structure:
    155. 

  155.         // * Header Object [required]
    156. 

  156.         //   * File Properties Object [required]   (global file attributes)
    157. 

  157.         //   * Stream Properties Object [required] (defines media stream & characteristics)
    158. 

  158.         //   * Header Extension Object [required]  (additional functionality)
    159. 

  159.         //   * Content Description Object          (bibliographic information)
    160. 

  160.         //   * Script Command Object               (commands for during playback)
    161. 

  161.         //   * Marker Object                       (named jumped points within the file)
    162. 

  162.         // * Data Object [required]
    163. 

  163.         //   * Data Packets
    164. 

  164.         // * Index Object
    165. 

  165. 

  166.         // Header Object: (mandatory, one only)
    167. 

  167.         // Field Name                   Field Type   Size (bits)
    168. 

  168.         // Object ID                    GUID         128             // GUID for header object - getid3_asf::Header_Object
    169. 

  169.         // Object Size                  QWORD        64              // size of header object, including 30 bytes of Header Object header
    170. 

  170.         // Number of Header Objects     DWORD        32              // number of objects in header object
    171. 

  171.         // Reserved1                    BYTE         8               // hardcoded: 0x01
    172. 

  172.         // Reserved2                    BYTE         8               // hardcoded: 0x02
    173. 

  173. 

  174.         $getid3->info['fileformat'] = 'asf';
    175. 

  175. 

  176.         fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
    177. 

  177.         $header_object_data = fread($getid3->fp, 30);
    178. 

  178. 

  179.         $info_asf_header_object['objectid_guid'] = getid3_asf::BytestringToGUID(substr($header_object_data, 0, 16));
    180. 

  180. 

  181.         if ($info_asf_header_object['objectid_guid'] != getid3_asf::Header_Object) {
    182. 

  182.             throw new getid3_exception('ASF header GUID {'.$info_asf_header_object['objectid_guid'].'} does not match expected "getid3_asf::Header_Object" GUID {'.getid3_asf::Header_Object.'}');
    183. 

  183.         }
    184. 

  184. 

  185.         getid3_lib::ReadSequence('LittleEndian2Int', $info_asf_header_object, $header_object_data, 16,
    186. 

  186.             array(
    187. 

  187.                 'objectsize'    => 8,
    188. 

  188.                 'headerobjects' => 4,
    189. 

  189.                 'reserved1'     => 1,
    190. 

  190.                 'reserved2'     => 1
    191. 

  191.             )
    192. 

  192.         );
    193. 

  193. 

  194.         $asf_header_data = fread($getid3->fp, $info_asf_header_object['objectsize'] - 30);
    195. 

  195.         $offset = 0;
    196. 

  196. 

  197.         for ($header_objects_counter = 0; $header_objects_counter < $info_asf_header_object['headerobjects']; $header_objects_counter++) {
    198. 

  198. 

  199.             $next_object_guid = substr($asf_header_data, $offset, 16);
    200. 

  200.             $offset += 16;
    201. 

  201. 

  202.             $next_object_size = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 8));
    203. 

  203.             $offset += 8;
    204. 

  204. 

  205.             $next_object_guidtext = getid3_asf::BytestringToGUID($next_object_guid);
    206. 

  206. 

  207.             switch ($next_object_guidtext) {
    208. 

  208. 

  209.                 case getid3_asf::File_Properties_Object:
    210. 

  210. 

  211.                     // File Properties Object: (mandatory, one only)
    212. 

  212.                     // Field Name                   Field Type   Size (bits)
    213. 

  213.                     // Object ID                    GUID         128             // GUID for file properties object - getid3_asf::File_Properties_Object
    214. 

  214.                     // Object Size                  QWORD        64              // size of file properties object, including 104 bytes of File Properties Object header
    215. 

  215.                     // File ID                      GUID         128             // unique ID - identical to File ID in Data Object
    216. 

  216.                     // File Size                    QWORD        64              // entire file in bytes. Invalid if Broadcast Flag == 1
    217. 

  217.                     // Creation Date                QWORD        64              // date & time of file creation. Maybe invalid if Broadcast Flag == 1
    218. 

  218.                     // Data Packets Count           QWORD        64              // number of data packets in Data Object. Invalid if Broadcast Flag == 1
    219. 

  219.                     // Play Duration                QWORD        64              // playtime, in 100-nanosecond units. Invalid if Broadcast Flag == 1
    220. 

  220.                     // Send Duration                QWORD        64              // time needed to send file, in 100-nanosecond units. Players can ignore this value. Invalid if Broadcast Flag == 1
    221. 

  221.                     // Preroll                      QWORD        64              // time to buffer data before starting to play file, in 1-millisecond units. If <> 0, PlayDuration and PresentationTime have been offset by this amount
    222. 

  222.                     // Flags                        DWORD        32              //
    223. 

  223.                     // * Broadcast Flag             bits         1  (0x01)       // file is currently being written, some header values are invalid
    224. 

  224.                     // * Seekable Flag              bits         1  (0x02)       // is file seekable
    225. 

  225.                     // * Reserved                   bits         30 (0xFFFFFFFC) // reserved - set to zero
    226. 

  226.                     // Minimum Data Packet Size     DWORD        32              // in bytes. should be same as Maximum Data Packet Size. Invalid if Broadcast Flag == 1
    227. 

  227.                     // Maximum Data Packet Size     DWORD        32              // in bytes. should be same as Minimum Data Packet Size. Invalid if Broadcast Flag == 1
    228. 

  228.                     // Maximum Bitrate              DWORD        32              // maximum instantaneous bitrate in bits per second for entire file, including all data streams and ASF overhead
    229. 

  229. 

  230.                     $info_asf['file_properties_object'] = array();
    231. 

  231.                     $info_asf_file_properties_object = &$info_asf['file_properties_object'];
    232. 

  232. 

  233.                     $info_asf_file_properties_object['objectid_guid']      = $next_object_guidtext;
    234. 

  234.                     $info_asf_file_properties_object['objectsize']         = $next_object_size;
    235. 

  235. 

  236.                     $info_asf_file_properties_object['fileid_guid']        = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    237. 

  237.                     $offset += 16;
    238. 

  238. 

  239.                     getid3_lib::ReadSequence('LittleEndian2Int', $info_asf_file_properties_object, $asf_header_data, $offset,
    240. 

  240.                         array(
    241. 

  241.                             'filesize'        => 8,
    242. 

  242.                             'creation_date'   => 8,
    243. 

  243.                             'data_packets'    => 8,
    244. 

  244.                             'play_duration'   => 8,
    245. 

  245.                             'send_duration'   => 8,
    246. 

  246.                             'preroll'         => 8,
    247. 

  247.                             'flags_raw'       => 4,
    248. 

  248.                             'min_packet_size' => 4,
    249. 

  249.                             'max_packet_size' => 4,
    250. 

  250.                             'max_bitrate'     => 4
    251. 

  251.                         )
    252. 

  252.                     );
    253. 

  253. 

  254.                     $offset += 64;
    255. 

  255. 

  256.                     if ($info_asf_file_properties_object['filesize'] > $getid3->info['filesize']) {
    257. 

  257.                         $getid3->warning('Probable truncated file: file_properties_object.filesize ('.number_format($info_asf_file_properties_object['filesize']).') > filesize ('.number_format($getid3->info['filesize']).')');
    258. 

  258.                     }
    259. 

  259. 

  260.                     $info_asf_file_properties_object['creation_date_unix'] = getid3_asf::FiletimeToUNIXtime($info_asf_file_properties_object['creation_date']);
    261. 

  261.                     $info_asf_file_properties_object['flags']['broadcast'] = (bool)($info_asf_file_properties_object['flags_raw'] & 0x0001);
    262. 

  262.                     $info_asf_file_properties_object['flags']['seekable']  = (bool)($info_asf_file_properties_object['flags_raw'] & 0x0002);
    263. 

  263. 

  264.                     $getid3->info['playtime_seconds'] = ($info_asf_file_properties_object['play_duration'] / 10000000) - ($info_asf_file_properties_object['preroll'] / 1000);
    265. 

  265.                     $getid3->info['bitrate']          = ($info_asf_file_properties_object['filesize'] * 8) / $getid3->info['playtime_seconds'];
    266. 

  266.                     break;
    267. 

  267. 

  268. 

  269.                 case getid3_asf::Stream_Properties_Object:
    270. 

  270. 

  271.                     // Stream Properties Object: (mandatory, one per media stream)
    272. 

  272.                     // Field Name                   Field Type   Size (bits)
    273. 

  273.                     // Object ID                    GUID         128             // GUID for stream properties object - getid3_asf::Stream_Properties_Object
    274. 

  274.                     // Object Size                  QWORD        64              // size of stream properties object, including 78 bytes of Stream Properties Object header
    275. 

  275.                     // Stream Type                  GUID         128             // getid3_asf::Audio_Media, getid3_asf::Video_Media or getid3_asf::Command_Media
    276. 

  276.                     // Error Correction Type        GUID         128             // getid3_asf::Audio_Spread for audio-only streams, getid3_asf::No_Error_Correction for other stream types
    277. 

  277.                     // Time Offset                  QWORD        64              // 100-nanosecond units. typically zero. added to all timestamps of samples in the stream
    278. 

  278.                     // Type-Specific Data Length    DWORD        32              // number of bytes for Type-Specific Data field
    279. 

  279.                     // Error Correction Data Length DWORD        32              // number of bytes for Error Correction Data field
    280. 

  280.                     // Flags                        WORD         16              //
    281. 

  281.                     // * Stream Number              bits         7 (0x007F)      // number of this stream.  1 <= valid <= 127
    282. 

  282.                     // * Reserved                   bits         8 (0x7F80)      // reserved - set to zero
    283. 

  283.                     // * Encrypted Content Flag     bits         1 (0x8000)      // stream contents encrypted if set
    284. 

  284.                     // Reserved                     DWORD        32              // reserved - set to zero
    285. 

  285.                     // Type-Specific Data           BYTESTREAM   variable        // type-specific format data, depending on value of Stream Type
    286. 

  286.                     // Error Correction Data        BYTESTREAM   variable        // error-correction-specific format data, depending on value of Error Correct Type
    287. 

  287. 

  288.                     // There is one getid3_asf::Stream_Properties_Object for each stream (audio, video) but the
    289. 

  289.                     // stream number isn't known until halfway through decoding the structure, hence it
    290. 

  290.                     // it is decoded to a temporary variable and then stuck in the appropriate index later
    291. 

  291. 

  292.                     $stream_properties_object_data['objectid_guid']      = $next_object_guidtext;
    293. 

  293.                     $stream_properties_object_data['objectsize']         = $next_object_size;
    294. 

  294. 

  295.                     getid3_lib::ReadSequence('LittleEndian2Int', $stream_properties_object_data, $asf_header_data, $offset,
    296. 

  296.                         array(
    297. 

  297.                             'stream_type'        => -16,
    298. 

  298.                             'error_correct_type' => -16,
    299. 

  299.                             'time_offset'        => 8,
    300. 

  300.                             'type_data_length'   => 4,
    301. 

  301.                             'error_data_length'  => 4,
    302. 

  302.                             'flags_raw'          => 2
    303. 

  303.                         )
    304. 

  304.                     );
    305. 

  305. 

  306.                     $stream_properties_stream_number                     =        $stream_properties_object_data['flags_raw'] & 0x007F;
    307. 

  307.                     $stream_properties_object_data['flags']['encrypted'] = (bool)($stream_properties_object_data['flags_raw'] & 0x8000);
    308. 

  308. 

  309.                     $stream_properties_object_data['stream_type_guid']   = getid3_asf::BytestringToGUID($stream_properties_object_data['stream_type']);
    310. 

  310.                     $stream_properties_object_data['error_correct_guid'] = getid3_asf::BytestringToGUID($stream_properties_object_data['error_correct_type']);
    311. 

  311. 

  312.                     $offset += 54; // 50 bytes + 4 bytes reserved - DWORD
    313. 

  313. 

  314.                     $stream_properties_object_data['type_specific_data'] = substr($asf_header_data, $offset, $stream_properties_object_data['type_data_length']);
    315. 

  315.                     $offset += $stream_properties_object_data['type_data_length'];
    316. 

  316. 

  317.                     $stream_properties_object_data['error_correct_data'] = substr($asf_header_data, $offset, $stream_properties_object_data['error_data_length']);
    318. 

  318.                     $offset += $stream_properties_object_data['error_data_length'];
    319. 

  319. 

  320.                     switch ($stream_properties_object_data['stream_type_guid']) {
    321. 

  321. 

  322.                         case getid3_asf::Audio_Media:
    323. 

  323. 

  324.                             $info_audio['dataformat']   = (@$info_audio['dataformat']   ? $info_audio['dataformat']   : 'asf');
    325. 

  325.                             $info_audio['bitrate_mode'] = (@$info_audio['bitrate_mode'] ? $info_audio['bitrate_mode'] : 'cbr');
    326. 

  326. 

  327.                             $audiodata = getid3_riff::RIFFparseWAVEFORMATex(substr($stream_properties_object_data['type_specific_data'], 0, 16));
    328. 

  328.                             unset($audiodata['raw']);
    329. 

  329.                             $info_audio = getid3_riff::array_merge_noclobber($audiodata, $info_audio);
    330. 

  330.                             break;
    331. 

  331. 

  332. 

  333.                         case getid3_asf::Video_Media:
    334. 

  334. 

  335.                             $info_video['dataformat']   = (@$info_video['dataformat']   ? $info_video['dataformat']   : 'asf');
    336. 

  336.                             $info_video['bitrate_mode'] = (@$info_video['bitrate_mode'] ? $info_video['bitrate_mode'] : 'cbr');
    337. 

  337.                             break;
    338. 

  338. 

  339. 

  340.                         /* does nothing but eat memory
    341. 

  341.                         case getid3_asf::Command_Media:
    342. 

  342.                         default:
    343. 

  343.                             // do nothing
    344. 

  344.                             break;
    345. 

  345.                         */
    346. 

  346.                     }
    347. 

  347. 

  348.                     $info_asf['stream_properties_object'][$stream_properties_stream_number] = $stream_properties_object_data;
    349. 

  349.                     unset($stream_properties_object_data); // clear for next stream, if any
    350. 

  350.                     break;
    351. 

  351. 

  352. 

  353.                 case getid3_asf::Header_Extension_Object:
    354. 

  354. 

  355.                     // Header Extension Object: (mandatory, one only)
    356. 

  356.                     // Field Name                   Field Type   Size (bits)
    357. 

  357.                     // Object ID                    GUID         128             // GUID for Header Extension object - getid3_asf::Header_Extension_Object
    358. 

  358.                     // Object Size                  QWORD        64              // size of Header Extension object, including 46 bytes of Header Extension Object header
    359. 

  359.                     // Reserved Field 1             GUID         128             // hardcoded: getid3_asf::Reserved_1
    360. 

  360.                     // Reserved Field 2             WORD         16              // hardcoded: 0x00000006
    361. 

  361.                     // Header Extension Data Size   DWORD        32              // in bytes. valid: 0, or > 24. equals object size minus 46
    362. 

  362.                     // Header Extension Data        BYTESTREAM   variable        // array of zero or more extended header objects
    363. 

  363. 

  364.                     $info_asf['header_extension_object'] = array();
    365. 

  365.                     $info_asf_header_extension_object    = &$info_asf['header_extension_object'];
    366. 

  366. 

  367.                     $info_asf_header_extension_object['objectid_guid']   = $next_object_guidtext;
    368. 

  368.                     $info_asf_header_extension_object['objectsize']      = $next_object_size;
    369. 

  369.                     $info_asf_header_extension_object['reserved_1_guid'] = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    370. 

  370.                     $offset += 16;
    371. 

  371. 

  372.                     if ($info_asf_header_extension_object['reserved_1_guid'] != getid3_asf::Reserved_1) {
    373. 

  373.                         $getid3->warning('header_extension_object.reserved_1 GUID ('.$info_asf_header_extension_object['reserved_1_guid'].') does not match expected "getid3_asf::Reserved_1" GUID ('.getid3_asf::Reserved_1.')');
    374. 

  374.                         break;
    375. 

  375.                     }
    376. 

  376. 

  377.                     $info_asf_header_extension_object['reserved_2'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    378. 

  378.                     $offset += 2;
    379. 

  379. 

  380.                     if ($info_asf_header_extension_object['reserved_2'] != 6) {
    381. 

  381.                         $getid3->warning('header_extension_object.reserved_2 ('.getid3_lib::PrintHexBytes($info_asf_header_extension_object['reserved_2']).') does not match expected value of "6"');
    382. 

  382.                         break;
    383. 

  383.                     }
    384. 

  384. 

  385.                     $info_asf_header_extension_object['extension_data_size'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 4));
    386. 

  386.                     $offset += 4;
    387. 

  387. 

  388.                     $info_asf_header_extension_object['extension_data'] = substr($asf_header_data, $offset, $info_asf_header_extension_object['extension_data_size']);
    389. 

  389.                     $offset += $info_asf_header_extension_object['extension_data_size'];
    390. 

  390.                     break;
    391. 

  391. 

  392. 

  393.                 case getid3_asf::Codec_List_Object:
    394. 

  394. 

  395.                     // Codec List Object: (optional, one only)
    396. 

  396.                     // Field Name                   Field Type   Size (bits)
    397. 

  397.                     // Object ID                    GUID         128             // GUID for Codec List object - getid3_asf::Codec_List_Object
    398. 

  398.                     // Object Size                  QWORD        64              // size of Codec List object, including 44 bytes of Codec List Object header
    399. 

  399.                     // Reserved                     GUID         128             // hardcoded: 86D15241-311D-11D0-A3A4-00A0C90348F6
    400. 

  400.                     // Codec Entries Count          DWORD        32              // number of entries in Codec Entries array
    401. 

  401.                     // Codec Entries                array of:    variable        //
    402. 

  402.                     // * Type                       WORD         16              // 0x0001 = Video Codec, 0x0002 = Audio Codec, 0xFFFF = Unknown Codec
    403. 

  403.                     // * Codec Name Length          WORD         16              // number of Unicode characters stored in the Codec Name field
    404. 

  404.                     // * Codec Name                 WCHAR        variable        // array of Unicode characters - name of codec used to create the content
    405. 

  405.                     // * Codec Description Length   WORD         16              // number of Unicode characters stored in the Codec Description field
    406. 

  406.                     // * Codec Description          WCHAR        variable        // array of Unicode characters - description of format used to create the content
    407. 

  407.                     // * Codec Information Length   WORD         16              // number of Unicode characters stored in the Codec Information field
    408. 

  408.                     // * Codec Information          BYTESTREAM   variable        // opaque array of information bytes about the codec used to create the content
    409. 

  409. 

  410.                     $info_asf['codec_list_object'] = array();
    411. 

  411.                     $info_asf_codec_list_object      = &$info_asf['codec_list_object'];
    412. 

  412. 

  413.                     $info_asf_codec_list_object['objectid_guid'] = $next_object_guidtext;
    414. 

  414.                     $info_asf_codec_list_object['objectsize']    = $next_object_size;
    415. 

  415. 

  416.                     $info_asf_codec_list_object['reserved_guid'] = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    417. 

  417.                     $offset += 16;
    418. 

  418. 

  419.                     if ($info_asf_codec_list_object['reserved_guid'] != '86D15241-311D-11D0-A3A4-00A0C90348F6') {
    420. 

  420.                         $getid3->warning('codec_list_object.reserved GUID {'.$info_asf_codec_list_object['reserved_guid'].'} does not match expected "getid3_asf::Reserved_1" GUID {86D15241-311D-11D0-A3A4-00A0C90348F6}');
    421. 

  421.                         break;
    422. 

  422.                     }
    423. 

  423. 

  424.                     $info_asf_codec_list_object['codec_entries_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 4));
    425. 

  425.                     $offset += 4;
    426. 

  426. 

  427.                     for ($codec_entry_counter = 0; $codec_entry_counter < $info_asf_codec_list_object['codec_entries_count']; $codec_entry_counter++) {
    428. 

  428. 

  429.                         $info_asf_codec_list_object['codec_entries'][$codec_entry_counter] = array();
    430. 

  430.                         $info_asf_codec_list_object_codecentries_current = &$info_asf_codec_list_object['codec_entries'][$codec_entry_counter];
    431. 

  431. 

  432.                         $info_asf_codec_list_object_codecentries_current['type_raw'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    433. 

  433.                         $offset += 2;
    434. 

  434. 

  435.                         $info_asf_codec_list_object_codecentries_current['type'] = getid3_asf::ASFCodecListObjectTypeLookup($info_asf_codec_list_object_codecentries_current['type_raw']);
    436. 

  436. 

  437.                         $codec_name_length = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2)) * 2; // 2 bytes per character
    438. 

  438.                         $offset += 2;
    439. 

  439. 

  440.                         $info_asf_codec_list_object_codecentries_current['name'] = substr($asf_header_data, $offset, $codec_name_length);
    441. 

  441.                         $offset += $codec_name_length;
    442. 

  442. 

  443.                         $codec_description_length = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2)) * 2; // 2 bytes per character
    444. 

  444.                         $offset += 2;
    445. 

  445. 

  446.                         $info_asf_codec_list_object_codecentries_current['description'] = substr($asf_header_data, $offset, $codec_description_length);
    447. 

  447.                         $offset += $codec_description_length;
    448. 

  448. 

  449.                         $codec_information_length = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    450. 

  450.                         $offset += 2;
    451. 

  451. 

  452.                         $info_asf_codec_list_object_codecentries_current['information'] = substr($asf_header_data, $offset, $codec_information_length);
    453. 

  453.                         $offset += $codec_information_length;
    454. 

  454. 

  455.                         if ($info_asf_codec_list_object_codecentries_current['type_raw'] == 2) { // audio codec
    456. 

  456. 

  457.                             if (strpos($info_asf_codec_list_object_codecentries_current['description'], ',') === false) {
    458. 

  458.                                 $getid3->warning('[asf][codec_list_object][codec_entries]['.$codec_entry_counter.'][description] expected to contain comma-seperated list of parameters: "'.$info_asf_codec_list_object_codecentries_current['description'].'"');
    459. 

  459.                             } else {
    460. 

  460. 	                            list($audio_codec_bitrate, $audio_codec_frequency, $audio_codec_channels) = explode(',', $this->TrimConvert($info_asf_codec_list_object_codecentries_current['description']));
    461. 

  461. 	                            $info_audio['codec'] = $this->TrimConvert($info_asf_codec_list_object_codecentries_current['name']);
    462. 

  462. 

  463. 	                            if (!isset($info_audio['bitrate']) && strstr($audio_codec_bitrate, 'kbps')) {
    464. 

  464. 	                                $info_audio['bitrate'] = (int)(trim(str_replace('kbps', '', $audio_codec_bitrate)) * 1000);
    465. 

  465. 	                            }
    466. 

  466. 

  467. 	                            if (!isset($info_video['bitrate']) && isset($info_audio['bitrate']) && isset($info_asf['file_properties_object']['max_bitrate']) && ($info_asf_codec_list_object['codec_entries_count'] > 1)) {
    468. 

  468. 	                                $info_video['bitrate'] = $info_asf['file_properties_object']['max_bitrate'] - $info_audio['bitrate'];
    469. 

  469. 	                            }
    470. 

  470. 

  471. 	                            if (!@$info_video['bitrate'] && @$info_audio['bitrate'] && @$getid3->info['bitrate']) {
    472. 

  472. 									$info_video['bitrate'] = $getid3->info['bitrate'] - $info_audio['bitrate'];
    473. 

  473. 								}
    474. 

  474. 

  475. 	                            $audio_codec_frequency = (int)trim(str_replace('kHz', '', $audio_codec_frequency));
    476. 

  476. 

  477. 	                            static $sample_rate_lookup = array(
    478. 

  478. 	                                8  =>  8000,    8000 =>  8000,
    479. 

  479. 	                                11 => 11025,   11025 => 11025,
    480. 

  480. 	                                12 => 12000,   12000 => 12000,
    481. 

  481. 	                                16 => 16000,   16000 => 16000,
    482. 

  482. 	                                22 => 22050,   22050 => 22050,
    483. 

  483. 	                                24 => 24000,   24000 => 24000,
    484. 

  484. 	                                32 => 32000,   32000 => 32000,
    485. 

  485. 	                                44 => 44100,   44100 => 44100,
    486. 

  486. 	                                48 => 48000,   48000 => 48000,
    487. 

  487. 	                            );
    488. 

  488. 

  489. 	                            $info_audio['sample_rate'] = @$sample_rate_lookup[$audio_codec_frequency];
    490. 

  490. 

  491. 	                            if (!$info_audio['sample_rate']) {
    492. 

  492. 	                                $getid3->warning('unknown frequency: "'.$audio_codec_frequency.'" ('.$this->TrimConvert($info_asf_codec_list_object_codecentries_current['description']).')');
    493. 

  493. 	                                break;
    494. 

  494. 	                            }
    495. 

  495. 

  496. 	                            if (!isset($info_audio['channels'])) {
    497. 

  497. 	                                if (strstr($audio_codec_channels, 'stereo')) {
    498. 

  498. 	                                    $info_audio['channels'] = 2;
    499. 

  499. 	                                } elseif (strstr($audio_codec_channels, 'mono')) {
    500. 

  500. 	                                    $info_audio['channels'] = 1;
    501. 

  501. 	                                }
    502. 

  502. 	                            }
    503. 

  503. 	                        }
    504. 

  504.                         }
    505. 

  505.                     }
    506. 

  506.                     break;
    507. 

  507. 

  508. 

  509.                 case getid3_asf::Script_Command_Object:
    510. 

  510. 

  511.                     // Script Command Object: (optional, one only)
    512. 

  512.                     // Field Name                   Field Type   Size (bits)
    513. 

  513.                     // Object ID                    GUID         128             // GUID for Script Command object - getid3_asf::Script_Command_Object
    514. 

  514.                     // Object Size                  QWORD        64              // size of Script Command object, including 44 bytes of Script Command Object header
    515. 

  515.                     // Reserved                     GUID         128             // hardcoded: 4B1ACBE3-100B-11D0-A39B-00A0C90348F6
    516. 

  516.                     // Commands Count               WORD         16              // number of Commands structures in the Script Commands Objects
    517. 

  517.                     // Command Types Count          WORD         16              // number of Command Types structures in the Script Commands Objects
    518. 

  518.                     // Command Types                array of:    variable        //
    519. 

  519.                     // * Command Type Name Length   WORD         16              // number of Unicode characters for Command Type Name
    520. 

  520.                     // * Command Type Name          WCHAR        variable        // array of Unicode characters - name of a type of command
    521. 

  521.                     // Commands                     array of:    variable        //
    522. 

  522.                     // * Presentation Time          DWORD        32              // presentation time of that command, in milliseconds
    523. 

  523.                     // * Type Index                 WORD         16              // type of this command, as a zero-based index into the array of Command Types of this object
    524. 

  524.                     // * Command Name Length        WORD         16              // number of Unicode characters for Command Name
    525. 

  525.                     // * Command Name               WCHAR        variable        // array of Unicode characters - name of this command
    526. 

  526. 

  527.                     // shortcut
    528. 

  528.                     $info_asf['script_command_object'] = array();
    529. 

  529.                     $info_asf_script_command_object    = &$info_asf['script_command_object'];
    530. 

  530. 

  531.                     $info_asf_script_command_object['objectid_guid'] = $next_object_guidtext;
    532. 

  532.                     $info_asf_script_command_object['objectsize']    = $next_object_size;
    533. 

  533.                     $info_asf_script_command_object['reserved_guid'] = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    534. 

  534.                     $offset += 16;
    535. 

  535. 

  536.                     if ($info_asf_script_command_object['reserved_guid'] != '4B1ACBE3-100B-11D0-A39B-00A0C90348F6') {
    537. 

  537.                         $getid3->warning('script_command_object.reserved GUID {'.$info_asf_script_command_object['reserved_guid'].'} does not match expected GUID {4B1ACBE3-100B-11D0-A39B-00A0C90348F6}');
    538. 

  538.                         break;
    539. 

  539.                     }
    540. 

  540. 

  541.                     $info_asf_script_command_object['commands_count']       = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    542. 

  542.                     $offset += 2;
    543. 

  543. 

  544.                     $info_asf_script_command_object['command_types_count']  = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    545. 

  545.                     $offset += 2;
    546. 

  546. 

  547.                     for ($command_types_counter = 0; $command_types_counter < $info_asf_script_command_object['command_types_count']; $command_types_counter++) {
    548. 

  548. 

  549.                         $command_type_name_length = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2)) * 2; // 2 bytes per character
    550. 

  550.                         $offset += 2;
    551. 

  551. 

  552.                         $info_asf_script_command_object['command_types'][$command_types_counter]['name'] = substr($asf_header_data, $offset, $command_type_name_length);
    553. 

  553.                         $offset += $command_type_name_length;
    554. 

  554.                     }
    555. 

  555. 

  556.                     for ($commands_counter = 0; $commands_counter < $info_asf_script_command_object['commands_count']; $commands_counter++) {
    557. 

  557. 

  558.                         $info_asf_script_command_object['commands'][$commands_counter]['presentation_time'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 4));
    559. 

  559.                         $offset += 4;
    560. 

  560. 

  561.                         $info_asf_script_command_object['commands'][$commands_counter]['type_index']        = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    562. 

  562.                         $offset += 2;
    563. 

  563. 

  564.                         $command_type_name_length                                                           = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2)) * 2; // 2 bytes per character
    565. 

  565.                         $offset += 2;
    566. 

  566. 

  567.                         $info_asf_script_command_object['commands'][$commands_counter]['name']              = substr($asf_header_data, $offset, $command_type_name_length);
    568. 

  568.                         $offset += $command_type_name_length;
    569. 

  569.                     }
    570. 

  570.                     break;
    571. 

  571. 

  572. 

  573.                 case getid3_asf::Marker_Object:
    574. 

  574. 

  575.                     // Marker Object: (optional, one only)
    576. 

  576.                     // Field Name                   Field Type   Size (bits)
    577. 

  577.                     // Object ID                    GUID         128             // GUID for Marker object - getid3_asf::Marker_Object
    578. 

  578.                     // Object Size                  QWORD        64              // size of Marker object, including 48 bytes of Marker Object header
    579. 

  579.                     // Reserved                     GUID         128             // hardcoded: 4CFEDB20-75F6-11CF-9C0F-00A0C90349CB
    580. 

  580.                     // Markers Count                DWORD        32              // number of Marker structures in Marker Object
    581. 

  581.                     // Reserved                     WORD         16              // hardcoded: 0x0000
    582. 

  582.                     // Name Length                  WORD         16              // number of bytes in the Name field
    583. 

  583.                     // Name                         WCHAR        variable        // name of the Marker Object
    584. 

  584.                     // Markers                      array of:    variable        //
    585. 

  585.                     // * Offset                     QWORD        64              // byte offset into Data Object
    586. 

  586.                     // * Presentation Time          QWORD        64              // in 100-nanosecond units
    587. 

  587.                     // * Entry Length               WORD         16              // length in bytes of (Send Time + Flags + Marker Description Length + Marker Description + Padding)
    588. 

  588.                     // * Send Time                  DWORD        32              // in milliseconds
    589. 

  589.                     // * Flags                      DWORD        32              // hardcoded: 0x00000000
    590. 

  590.                     // * Marker Description Length  DWORD        32              // number of bytes in Marker Description field
    591. 

  591.                     // * Marker Description         WCHAR        variable        // array of Unicode characters - description of marker entry
    592. 

  592.                     // * Padding                    BYTESTREAM   variable        // optional padding bytes
    593. 

  593. 

  594.                     $info_asf['marker_object'] = array();
    595. 

  595.                     $info_asf_marker_object    = &$info_asf['marker_object'];
    596. 

  596. 

  597.                     $info_asf_marker_object['objectid_guid'] = $next_object_guidtext;
    598. 

  598.                     $info_asf_marker_object['objectsize']    = $next_object_size;
    599. 

  599.                     $info_asf_marker_object['reserved_guid'] = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    600. 

  600.                     $offset += 16;
    601. 

  601. 

  602.                     if ($info_asf_marker_object['reserved_guid'] != '4CFEDB20-75F6-11CF-9C0F-00A0C90349CB') {
    603. 

  603.                         $getid3->warning('marker_object.reserved GUID {'.$info_asf_marker_object['reserved_guid'].'} does not match expected GUID {4CFEDB20-75F6-11CF-9C0F-00A0C90349CB}');
    604. 

  604.                         break;
    605. 

  605.                     }
    606. 

  606. 

  607.                     $info_asf_marker_object['markers_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 4));
    608. 

  608.                     $offset += 4;
    609. 

  609. 

  610.                     $info_asf_marker_object['reserved_2']    = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    611. 

  611.                     $offset += 2;
    612. 

  612. 

  613.                     if ($info_asf_marker_object['reserved_2'] != 0) {
    614. 

  614.                         $getid3->warning('marker_object.reserved_2 ('.getid3_lib::PrintHexBytes($info_asf_marker_object['reserved_2']).') does not match expected value of "0"');
    615. 

  615.                         break;
    616. 

  616.                     }
    617. 

  617. 

  618.                     $info_asf_marker_object['name_length']   = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    619. 

  619.                     $offset += 2;
    620. 

  620. 

  621.                     $info_asf_marker_object['name'] = substr($asf_header_data, $offset, $info_asf_marker_object['name_length']);
    622. 

  622.                     $offset += $info_asf_marker_object['name_length'];
    623. 

  623. 

  624.                     for ($markers_counter = 0; $markers_counter < $info_asf_marker_object['markers_count']; $markers_counter++) {
    625. 

  625. 

  626.                         getid3_lib::ReadSequence('LittleEndian2Int', $info_asf_marker_object['markers'][$markers_counter], $asf_header_data, $offset,
    627. 

  627.                             array(
    628. 

  628.                                 'offset'                    => 8,
    629. 

  629.                                 'presentation_time'         => 8,
    630. 

  630.                                 'entry_length'              => 2,
    631. 

  631.                                 'send_time'                 => 4,
    632. 

  632.                                 'flags'                     => 4,
    633. 

  633.                                 'marker_description_length' => 4
    634. 

  634.                             )
    635. 

  635.                         );
    636. 

  636.                         $offset += 30;
    637. 

  637. 

  638.                         $info_asf_marker_object['markers'][$markers_counter]['marker_description'] = substr($asf_header_data, $offset, $info_asf_marker_object['markers'][$markers_counter]['marker_description_length']);
    639. 

  639.                         $offset += $info_asf_marker_object['markers'][$markers_counter]['marker_description_length'];
    640. 

  640. 

  641.                         $padding_length = $info_asf_marker_object['markers'][$markers_counter]['entry_length'] - 4 -  4 - 4 - $info_asf_marker_object['markers'][$markers_counter]['marker_description_length'];
    642. 

  642.                         if ($padding_length > 0) {
    643. 

  643.                             $info_asf_marker_object['markers'][$markers_counter]['padding'] = substr($asf_header_data, $offset, $padding_length);
    644. 

  644.                             $offset += $padding_length;
    645. 

  645.                         }
    646. 

  646.                     }
    647. 

  647.                     break;
    648. 

  648. 

  649. 

  650.                 case getid3_asf::Bitrate_Mutual_Exclusion_Object:
    651. 

  651. 

  652.                     // Bitrate Mutual Exclusion Object: (optional)
    653. 

  653.                     // Field Name                   Field Type   Size (bits)
    654. 

  654.                     // Object ID                    GUID         128             // GUID for Bitrate Mutual Exclusion object - getid3_asf::Bitrate_Mutual_Exclusion_Object
    655. 

  655.                     // Object Size                  QWORD        64              // size of Bitrate Mutual Exclusion object, including 42 bytes of Bitrate Mutual Exclusion Object header
    656. 

  656.                     // Exlusion Type                GUID         128             // nature of mutual exclusion relationship. one of: (getid3_asf::Mutex_Bitrate, getid3_asf::Mutex_Unknown)
    657. 

  657.                     // Stream Numbers Count         WORD         16              // number of video streams
    658. 

  658.                     // Stream Numbers               WORD         variable        // array of mutually exclusive video stream numbers. 1 <= valid <= 127
    659. 

  659. 

  660.                     // shortcut
    661. 

  661.                     $info_asf['bitrate_mutual_exclusion_object'] = array();
    662. 

  662.                     $info_asf_bitrate_mutual_exclusion_object    = &$info_asf['bitrate_mutual_exclusion_object'];
    663. 

  663. 

  664.                     $info_asf_bitrate_mutual_exclusion_object['objectid_guid'] = $next_object_guidtext;
    665. 

  665.                     $info_asf_bitrate_mutual_exclusion_object['objectsize']    = $next_object_size;
    666. 

  666.                     $info_asf_bitrate_mutual_exclusion_object['reserved_guid'] = getid3_asf::BytestringToGUID(substr($asf_header_data, $offset, 16));
    667. 

  667.                     $offset += 16;
    668. 

  668. 

  669.                     if ($info_asf_bitrate_mutual_exclusion_object['reserved_guid'] != getid3_asf::Mutex_Bitrate  &&  $info_asf_bitrate_mutual_exclusion_object['reserved_guid'] != getid3_asf::Mutex_Unknown) {
    670. 

  670.                         $getid3->warning('bitrate_mutual_exclusion_object.reserved GUID {'.$info_asf_bitrate_mutual_exclusion_object['reserved_guid'].'} does not match expected "getid3_asf::Mutex_Bitrate" GUID {'.getid3_asf::Mutex_Bitrate.'} or  "getid3_asf::Mutex_Unknown" GUID {'.getid3_asf::Mutex_Unknown.'}');
    671. 

  671.                         break;
    672. 

  672.                     }
    673. 

  673. 

  674.                     $info_asf_bitrate_mutual_exclusion_object['stream_numbers_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_data, $offset, 2));
    675. 

  675.                     $offset += 2;
    676. 

  676. 

  677.                     for ($stream_number_counter = 0; $stream_number_counter < $info_asf_bitrate_mutual_exclusion_object['stream_numbers_count']; $stream_number_counter++) {
    678. 

  678.                         $info_asf_bitrate_mut…
    679.

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